Here are the final pictures:
Thanks for all the name suggestions! But now that I'm completely confused by all the animal names ("Gazelle" has been added by a friend), I think I'll settle for "Quad Gun Tractor", undecisive and unimaginative guy that I am
Release will be tomorrow morning, retail price will be 21.50 EUR.
Jack, I had the wheels made before I knew Shapeways existed. I won't tell how much I spent, but rest assured it was waaaaay too expensive for what I got in the end.
Now on to the post-apoc conversion...